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Loans and Allowance For Credit Losses - Summary of Information Related to Impaired Loans (Detail) - Loans Receivable [Member] - SBA [Member] - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2022
Dec. 31, 2021
Financing Receivable, Impaired [Line Items]    
Recorded Investment With no related allowance $ 182 $ 232
Unpaid Principal Balance With no related allowance 580 705
Average Recorded Investment With no related allowance 207 233
Interest Income Recognized With no related allowance   14
Recorded Investment With an allowance 0 499
Unpaid Principal Balance With an allowance 0 499
Related Allowance 0 142
Average Recorded Investment With an allowance 249 477
Interest Income Recognized With an allowance 0 59
Recorded Investment 182 731
Unpaid Principal Balance 580 1,204
Average Recorded Investment 457 710
Interest Income Recognized $ 0 $ 73